/Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpressionGIReplace.h
class UMaterialExpressionGIReplace : public [UMaterialExpression](API\Runtime\Engine\Materials\UMaterialExpression)
FExpressionInpu...
Default
Used for direct lighting computations e.g. real-time shaders
FExpressionInpu...
DynamicIndirect
Used for dynamic indirect lighting e.g. Light Propagation Volumes
FExpressionInpu...
StaticIndirect
Used for baked indirect lighting e.g. Lightmass